Riving device



I L. H. HOLLAND.

mymaonwE. APPLICATION FILED AUG-261 I919- 1, 383,208. Patented Junel28, 1921.

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L. H. HOLLAND. RIVING DEVHZEa APPLICATION FILED AUG-26, I919. 1,383,208. v PatentedJuneZS, 192,1.

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UNITED STATES PATENT OFFICE.

LYLE H. HOLLAND, OF PETERBORO, NEW HAMPSHIRE, ASSIGNOR TO EASTERN STATES PACKAGE (10., OF BUFFALO, NEW YORK, A CORPORATION.

RIVING DEVICE.

Specification of Letters Patent.

Application filed August 26, 1919. Serial No. 319,973.

To aZZ to 710m it may concern:

Be it known that I, LYLE H. HOLLAND, a citizen of the United States, residing at Peterboro, in the county of Hillsborough and State of New Hampshire, have invented new and useful Improvements in Riving Devices, of which the following is a specification.

This invention relates to improvements in riving apparatus and has for its principal object to provide a device for cutting a plurality of strips of uniform thickness from a piece of material.

Another object of the invention is to provide a means for adjusting the device so as to vary the thickness of the strips or to cut a plurality of strips of varying thickness simultaneously;

A further object of the invention is to provide a device having a plurality of blades arranged so that the blade for cutting the first or topmost strip is slightly in advance of the other blades, thereby causing the blades to engage the piece to be cut successively. In that manner it will be seen that the starting strains caused when the river contacts with the piece is more evenly dis tributed thereby avoiding a jerky movement and producing strips having relatively smooth plane surfaces which need no further finishing treatment.

Vith the above and other objects in view the invention consists in the novel construction, combination and arrangement of parts which will be fully set forth in the follow ing specification claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a side view in elevation showing the river in use,

Fig. 2 is an enlarged top plan view of the river,

Fig. 3 is a bottom plan view of Fig. 2

Fig. 4 is an edge view of Fig. 2, and

Fig. 5 is a longitudinal sectional view through the river.

Referring to the drawings by characters of reference the numeral designates in its entirety the yoke or frame of this river which comprises a base plate 11 of substantially rectangular formation having formed at its side edges lateral extensions 12 of cylindrical formation to which are attached the tugs which will be more fully hereinafter described. Formed at the extreme outer ends of the extensions 12 are the forwardly extending handles 13 by means of which the direction of movement of the river is controlled. A groove 1% is formed in the under side of the base plate between the side edges thereof and formed in the front edge of the base plate is a recess 15 for the accommodation of the throat piece 16 to be more fully hereinafter set forth.

The throat piece 16 comprises a body 17 having formed at its opposite ends the extensions 18 at the extreme outer ends of which are threaded openings 19 for the reception of set screws 20 by means of which the throat piece is adjusted. Apertures 21 are formed in the extensions between the set screws 20 and the body 17 and the securing and adjusting screws 22 extend through these apertures and into threaded openings in the base plate. The under side or face of the body is inclined downwardly and rearwardly as at 28 from the forward face of the throat piece to provide a guide bv which the river blades are directed against the piece to be out. i

T ireaded into the forward edge of the base plate 11 and adjacent opposite ends of the recess 15 are screws 24 by means of which the adjustable guide blocks 25 are held in position. Each of these guide blocks comprises a longitudinal slotted body 26 formed on 1ts lower edge with a flange 27 which partially overlies the lower face of the base plate 11 adjacent its forward edge. It will thus be seen that upon loosening the screws 2st the guide blocks may be adjusted inwardly or outwardly, but the flanges 27 will prevent rotation of the same about the screws 21.

Threaded into the underside of the base plate 11 and adjacent opposite edges of the groove 14 are screws 28 which are arranged about midway between the forward and rear edges of the base plate. These screws 28 extend through the rectangular bodies 29of clamps 30 and act to draw the clamps firmly against the primary cutting blade 31. Each clamp above referred to comprises a body '29 having formed on its inner face and adjacent its outer edge a rib or foot 32 while its inner edge is formed with a clamping flange 33. As illustrated in the drawings the flanges 33 bear on the under side of the primary blade and the rib 32 engages the base plate 11 so that when the screw 28 is tightened into the base plate the pressure will tend to rock the clamp on the rib as a Patented J une 28, 192 1.

fulcrum and thereby cause the flange 33 to bind against the primary blade 31 thus hold ing said blade against accidental displacement.

Extending through the base plate 11 adjacent its rear edge and adjacent opposite side edges of the groove 14 are set screws 34. Similar setscrews are positionedin the base plate 11 intermediate the screws 3% and the axis of the extensions 12 and as shown, these screws 34 and 35 are extended through said plate 11 from the upper side thereof. As shown the points of the screws 84: and 35 are positioned well below the underside of the base plate and in such a manner as to form a rest or support for the secondary cutting blade 36. V A pair of clamps 37 are located on the underside of the'base plate 11 and each of these clamps comprises a rectangular body formed at its inner edge with a blade clamping flange 38. A pair of legs 39 is secured to the outer side ofeach clamp 37 adjacent its outer edge and extending through the clamp body between thefiange and the legs is a clamping screw -10 which is threaded into the under side of the base plate 11 as clearly illustrated in the drawings. It will thus be seen that when the screws to are tightened the clamping flanges 38 of the clamps 37 will bind against the secondary cutting blade 36, thereby forcing said blade into frictional engagement with the set screws 34 and 35 thus holding said blade against accidental move ment. i

The river is moved during the cutting op eration by attaching the tugs ll carried by the extensions 12 to a suitable mechanism such as a winding drum 42 and setting said mechanism in operation..' The piece 43 from which the thin strips are to be cut is clamped in a suitablevise at and may have it opposite end supported on a prop 41 5. The handles 13 are grasped by the operator and the device is guided over the piece as shown in Fig. 1. In the riving operation it will be seen that the primary cutting blade 3l'is the first to engage the piece and start a out. After traveling for a short distancethe secondary blade is brought into action thereby avoiding the bringing of undue strain upon the river and operating mechanism at the beginning of the operation, thereby producing a smooth even surface on the strips,

' which requires no additional finishin In order that curling of the strips may be avoided a shield 46 is secured to the rear edge of the base plate 11 and is curved downwardly and rearwardly as at 47 thereby causing the strips to be directed downwardly and overcoming their tendency to curl. It will also be noted that by advancing or retarding the blades the thickness of the strips may be varied to suit various purposes and also such adjustment will permit strips of varying thickness to be cut simultaneously. V

/Vhile in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that certain minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having thus described the invention and set forth the manner of its construction, application and use what is claimed as new is:-

1. In a riving device, a base plate having a groove in its under side extending from the forward to the rear edge thereof, a primary cutting blade adjustably secured to the under side of the base plate a secondary cutting blade adjustably secured beneath the base plate in spaced relation to the primary cutting blade and slightly in the rear of the forward cutting edge of the primary blade and a curl preventing shield associated with the base plate.

2. In a riving device, a base plate, tugs connected to opposite side edges of said base plate, the plate having a groove in its under side extending from the forward to the 'ear edge thereof a throat piece at the forward end of the base groove, a primary cut ting blade adjustably mounted on the underside of the base plate adjacent the throat piece, a secondary cutting blade adjustably mounted beneath and in spaced relation to the primary cutting blade, the said primary blade having its cutting edge mounted in advance of the cutting edge of the, secondary blade to reduce the strain on the tugs when starting the cutting operation and a shield to prevent the strips produced by the device from curlin m In testimony whereof I have signed my name to this application.

' LYLE H. HOLLAND. 

